41304-88-5Relevant articles and documents
LED based on alternating benzene-furan oligomers
Song, Senchuan,Chen, Jianghan,Pan, Wenlong,Song, Hucacan,Shi, Huahong,Mai, Yuliang,Wen, Wu
, p. 157 - 166 (2017)
A series of conjugated-chain compounds which contain two furan units and more than three other aromatic ring units were synthesized by two different methods, their UV–visible absorption coefficient (ε), maximum absorption wavelengths (λa), fluorescence emission wavelengths (λe), stokes shift and quantum yields (Φ) were determined, the relationships between the molecular structures and the effects of spectral behaviors were discussed. Meanwhile, the excitation spectrum and emission spectrum of 2b and 2d in solid and in ethyl acetate were respectively recorded, the thermal stability of 2b and 2d was evaluated, and the fluorescence emission behaviors of two light emitting diodes, fabricated with 2b and 2d as phosphors, were investigated. The results showed that most of target compounds can perform high fluorescence emission ability, compounds 2b and 2d can perform higher thermal stability under 350?°C and they are suitable for making light emitting diode as phosphors, the light emitting diodes fabricated with 2b and 2d can show higher fluorescence emission ability. Therefore, those compounds are worthy of further being developed as fluorescent emission materials.
Palladium anchored on amine-functionalized K10 as an efficient, heterogeneous and reusable catalyst for carbonylative Sonogashira reaction
Chavan, Sujit P.,Varadwaj, G.Bishwa Bidita,Parida, Kulamani,Bhanage, Bhalchandra M.
, p. 237 - 245 (2015/10/12)
The present work describes the immobilization of palladium chloride (II) on the amine functionalized K10 support and its application toward the carbonylative Sonogashira reactions. The various catalyst characterization techniques revealed the successful grafting of APTES moiety on the K10 clay surface through covalent bonding and Pd with the NH2 groups of APTES@K10 through co-ordinate bonding. The immobilized catalyst was successively applied for copper and phosphine free carbonylative Sonogashira reaction of aryl and hetero aryl iodides with terminal alkynes. To our delight, the electron withdrawing aryl halides can be efficiently utilized as an electrophiles giving higher selectivity toward carbonylated products. Moreover, dibenzoylmethane which is a potential synthetic intermediate in organic transformation has been also synthesized using this protocol. Recovery of catalyst by simple filtration and its reuse up to four consecutive cycles ensure the robustness of present catalytic protocol.
Synthesis of 3-carbonyl pyrazole-5-phosphonates via 1,3-dipolar cycloaddition of Bestmann-Ohira reagent with ynones
Pramanik, Mukund M.D.,Kant, Ruchir,Rastogi, Namrata
, p. 5214 - 5220 (2014/12/10)
The present work explores the hitherto unexplored reactivity of ynones as dipolarophiles with Bestmann-Ohira reagent. The reaction offers a convenient route for the synthesis of regioisomerically pure 3,5-disubstituted or 3,4,5-trisubstituted pyrazoles in
